Harry has been looking glum following his split from 32-year-old Caroline Flack (Picture: XPOSUREPHOTOS.COM)

Teenage heartthrob Harry has only been single a few days after calling it a day with the 32-year-old Xtra Factor co-host, but California girl Katherine is unfazed by the stiff competition vying for his attention.

After stumbling across one of 1D’s videos, the 22-year-old tweeted: ‘Just watched my first One Direction video with my cousin and @Harry_Styles is a cutie indeed!’

One Direction were mobbed by hoards of fans when they touched down in LA (Picture: XPOSUREPHOTOS.COM)

Harry and the band have been relaxing poolside ahead of their US tour (Picture: XPOSUREPHOTOS.COM)

But Harry, who touched down at LAX airport with the rest of the band at the weekend, has not yet acknowledged the compliment.

And it would seem the mob of screaming fans camped outside the W Hotel in Los Angeles, where the group are staying, are failing to distract him from his thoughts of people back at home.

He wrote on his Twitter account yesterday: ‘Just woke up thanks to a lovely crowd outside. Sunny day! Missing everyone back in the UK… :) .x

On Friday, the What Makes You Beautiful singer insisted his split with Flack was a mutual decision.

He tweeted: ‘Please know I didn’t ‘dump’ Caroline. This was a mutual decision. She is one of the kindest, sweetest people I know. Please respect that.’

Harry and his bandmates Niall Horan , Zayn Malik , Liam Payne and Louis Tomlinson are scheduled to make an appearance on hit TV show iCarly today, before they start their US tour Big Time Rush.